package com.atguigu.flink.chapter10.join;


import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;

import java.time.Duration;

/*
内连接
------------------------------------
默认情况下，所有数据永远存储到状态中（内存）
生产环境下，一定要给数据设置ttl
 */
public class InnerJoin {
    public static void main(String[] args) {
        Configuration conf = new Configuration();
        conf.setInteger("rest.port",2000);
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(conf);
        env.setParallelism(1);
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env);
        //设置空闲状态的保留时间
        tEnv.getConfig().setIdleStateRetention(Duration.ofSeconds(20));

        tEnv.executeSql("create table t1(" +
                "id string," +
                "name string" +
                ") with(" +
                "  'connector' = 'kafka', " +
                "  'topic' = 't1', " +
                "  'properties.bootstrap.servers' = 'hadoop162:9092', " +
                "  'properties.group.id' = 'atguigu', " +
                "  'scan.startup.mode' = 'latest-offset', " +
                "  'format' = 'csv' " +
                ")");

        tEnv.executeSql("create table t2(" +
                "id string," +
                "name string," +
                "age int " +
                ") with(" +
                "  'connector' = 'kafka', " +
                "  'topic' = 't1', " +
                "  'properties.bootstrap.servers' = 'hadoop162:9092', " +
                "  'properties.group.id' = 'atguigu', " +
                "  'scan.startup.mode' = 'latest-offset', " +
                "  'format' = 'csv' " +
                ")");


        //内连接
        /*tEnv.sqlQuery("select " +
                "t1.id," +
                "name," +
                "age " +
                "from t1 " +
                "join t2 on t1.id = t2.id")
                .execute()
                .print();
         */

        tEnv.sqlQuery("select " +
                "t1.id," +
                "name," +
                "age " +
                "from t1,t2 where t1.id = t2.id ")
                .execute()
                .print();
    }
}


//public class InnerJoin {
//    public static void main(String[] args) {
//        Configuration conf = new Configuration();
//        conf.setInteger("rest.port",2000);
//        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(conf);
//        env.setParallelism(1);
//
//        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env);
//        //设置空闲状态保留时间
//        tEnv.getConfig().setIdleStateRetention(Duration.ofSeconds(20));
//
//        tEnv.executeSql("create table t1(" +
//                "id string," +
//                "name string" +
//                ") with(" +
//                "  'connector' = 'kafka', " +
//                "  'topic' = 't1', " +
//                "  'properties.bootstrap.servers' = 'hadoop162:9092', " +
//                "  'properties.group.id' = 'atguigu', " +
//                "  'scan.startup.mode' = 'latest-offset', " +
//                "  'format' = 'csv' " +
//                ")");
//
//
//        tEnv.executeSql("create table t2(" +
//                "id string," +
//                "name string" +
//                ") with(" +
//                "  'connector' = 'kafka', " +
//                "  'topic' = 't1', " +
//                "  'properties.bootstrap.servers' = 'hadoop162:9092', " +
//                "  'properties.group.id' = 'atguigu', " +
//                "  'scan.startup.mode' = 'latest-offset', " +
//                "  'format' = 'csv' " +
//                ")");
//
//
//        //内连接
////
////        tEnv.sqlQuery("select " +
////                "t1.id," +
////                "name " +
////                "from t1 " +
////                "join t2 on t1.id = t2.id")
////                .execute()
////                .print();
//
//        tEnv.sqlQuery("select " +
//                "t1.id," +
//                "name " +
//                "from t1,t2 where t1.id = t2.id");
//    }
//}
//

























